InChI=1S/C22H34O7/c1-6-8-15(5)16(12-11-14(4)10-7-9-13(2)3)28-22-19(25)17(23)18(24)20(29-22)21(26)27/h6,8-9,11,16-20,22-25H,1,7,10,12H2,2-5H3,(H,26,27)/b14-11-,15-8+